Process of producing erythrene.



. "UNITED STATES PATENT oFFIoE.

' CARL HARRIES, F KIEL, GERMANY, ASSIGNOR TO FARBENFABRIKEN VORM. FBIEDR.

BAYER & 00., OF ELBERFELD, GERMANY, A CORPORATION OF GERMANY.

PROCESS or PRODUCING ERYTHRENE.

1N0 Drawing.

To all whom it may concern:

Be it known that I, CARL HARRIES, doctor of philosophy, professor of chemistry, citizen of the German Empire, residing at Kiel,

'. genid with an ox'y compound of a'metal of fully the following example is parts being by we1ght:In a sultable disare slowly added metallobasic character, 6. g. soda lime, calcium hydroxid, magnesia, carbonates. For-'' this purpose butylene halogenid vapors are passed over the heated oxids, etc.

In order to illustratethe new process more ven, the

tilling apparatus 1000 parts of soda lime are dried by heating. while introducing CO Subsequently the temperature in the apparatus is raised to about 600 C. and at the same time 500 parts. of butylene bromid (2.3-dibromo-2-butylene) oin-on-Br cm-dH-m to the heated mass, The

unchanged parent material returns into the apparatus while the gases are freed from liquid hydrocarbonsby eflicientcooling. By

physical or chemical methods the erythrene can be isolated in the ,well known manner.

I claim:'

1. The herein described process forproducing erythrene, which process consists in treating a butylene halogenid with anoxy compound of a metal of metallobasic character and in separating erythrene from the gaseous product thus produced, substantially as. described.

2. The herein described process for producing erythrene, whichprocess consists in treating a butylene halogenid with soda lime and in separating. erythrene from the gaseous mixtures thus produced,substantially as described' 3. The hereindescribed process for produoingerythrene, which process consists in treating a butylene bromid with an oXy compound of a metal of metallobasic char- Patented Sept. 10, 1912.

acter and in separating erythrene from the gaseous mixtures thus produced, substan tially as described.

4. The-herein described process for producing erythrene, which process consist-s in treating butylene bromid with soda lime and in separating erythrene from the gaseous mixtures thus produced, substantially as described.

In testimony whereof I have hereunto set my hand inthe presence of two subscribing witnesses.

. CARL HARRIES.

Witnesses:

JULIUS R6PKE, MAX KALWA. 

